  // 退出弹层
  $(document).on('click', '.confirm-head a', function() {
      $('.layer-quit-wrap').show();
  })
  $(document).on('click', '.layer-quit-wrap button', function() {
      $('.layer-quit-wrap').hide();
  })
  $(document).on('click', '.confirm-img figure', function() {
 
      $('.download').show();
  })

  // 图片预览
  var initPhotoSwipeFromDOM = function(gallerySelector) {

      // parse slide data (url, title, size ...) from DOM elements 
      // (children of gallerySelector)
      var parseThumbnailElements = function(el) {
          var thumbElements = el.childNodes,
              numNodes = thumbElements.length,
              items = [],
              figureEl,
              linkEl,
              size,
              item;

          for (var i = 0; i < numNodes; i++) {

              figureEl = thumbElements[i]; // <figure> element

              // include only element nodes 
              if (figureEl.nodeType !== 1) {
                  continue;
              }

              linkEl = figureEl.children[0]; // <a> element

              size = linkEl.getAttribute('data-size').split('x');

              // create slide object
              item = {
                  src: linkEl.getAttribute('href'),
                  w: parseInt(size[0], 10),
                  h: parseInt(size[1], 10)
              };



              if (figureEl.children.length > 1) {
                  // <figcaption> content
                  item.title = figureEl.children[1].innerHTML;
              }

              if (linkEl.children.length > 0) {
                  // <img> thumbnail element, retrieving thumbnail url
                  item.msrc = linkEl.children[0].getAttribute('src');
              }

              item.el = figureEl; // save link to element for getThumbBoundsFn
              items.push(item);
          }

          return items;
      };

      // find nearest parent element
      var closest = function closest(el, fn) {
          return el && (fn(el) ? el : closest(el.parentNode, fn));
      };

      // triggers when user clicks on thumbnail
      var onThumbnailsClick = function(e) {
          e = e || window.event;
          e.preventDefault ? e.preventDefault() : e.returnValue = false;

          var eTarget = e.target || e.srcElement;

          // find root element of slide
          var clickedListItem = closest(eTarget, function(el) {
              return (el.tagName && el.tagName.toUpperCase() === 'FIGURE');
          });

          if (!clickedListItem) {
              return;
          }

          // find index of clicked item by looping through all child nodes
          // alternatively, you may define index via data- attribute
          var clickedGallery = clickedListItem.parentNode,
              childNodes = clickedListItem.parentNode.childNodes,
              numChildNodes = childNodes.length,
              nodeIndex = 0,
              index;

          for (var i = 0; i < numChildNodes; i++) {
              if (childNodes[i].nodeType !== 1) {
                  continue;
              }

              if (childNodes[i] === clickedListItem) {
                  index = nodeIndex;
                  break;
              }
              nodeIndex++;
          }



          if (index >= 0) {
              // open PhotoSwipe if valid index found
              openPhotoSwipe(index, clickedGallery);
          }
          return false;
      };

      // parse picture index and gallery index from URL (#&pid=1&gid=2)
      var photoswipeParseHash = function() {
          var hash = window.location.hash.substring(1),
              params = {};

          if (hash.length < 5) {
              return params;
          }

          var vars = hash.split('&');
          for (var i = 0; i < vars.length; i++) {
              if (!vars[i]) {
                  continue;
              }
              var pair = vars[i].split('=');
              if (pair.length < 2) {
                  continue;
              }
              params[pair[0]] = pair[1];
          }

          if (params.gid) {
              params.gid = parseInt(params.gid, 10);
          }

          return params;
      };

      var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
          var pswpElement = document.querySelectorAll('.pswp')[0],
              gallery,
              options,
              items;

          items = parseThumbnailElements(galleryElement);


          // define options (if needed)
          options = {

              // define gallery index (for URL)
              galleryUID: galleryElement.getAttribute('data-pswp-uid'),

              getThumbBoundsFn: function(index) {
                  // See Options -> getThumbBoundsFn section of documentation for more info
                  var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail
                      pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
                      rect = thumbnail.getBoundingClientRect();

                  return {
                      x: rect.left,
                      y: rect.top + pageYScroll,
                      w: rect.width
                  };
              },
              // closeOnVerticalDrag  :false
              tapToClose: true,
              arrowEl:false,
              shareEl:false,
              fullscreenEl:false


          };

          // PhotoSwipe opened from URL
          if (fromURL) {
              if (options.galleryPIDs) {
                  // parse real index when custom PIDs are used 
                  // http://photoswipe.com/documentation/faq.html#custom-pid-in-url
                  for (var j = 0; j < items.length; j++) {
                      if (items[j].pid == index) {
                          options.index = j;
                          break;
                      }
                  }
              } else {
                  // in URL indexes start from 1
                  options.index = parseInt(index, 10) - 1;
              }
          } else {
              options.index = parseInt(index, 10);
          }

          // exit if index not found
          if (isNaN(options.index)) {
              return;
          }

          if (disableAnimation) {
              options.showAnimationDuration = 0;
          }

          // Pass data to PhotoSwipe and initialize it
          gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, items, options);

          gallery.init();

          // 关闭事件
          gallery.listen('close', function() {
              $('.download').hide();
          });

      };

      // loop through all gallery elements and bind events
      var galleryElements = document.querySelectorAll(gallerySelector);

      for (var i = 0, l = galleryElements.length; i < l; i++) {
          galleryElements[i].setAttribute('data-pswp-uid', i + 1);
          galleryElements[i].onclick = onThumbnailsClick;
      }


      // Parse URL and open gallery if it contains #&pid=3&gid=1
      var hashData = photoswipeParseHash();
      if (hashData.pid && hashData.gid) {
          openPhotoSwipe(hashData.pid, galleryElements[hashData.gid - 1], true, true);
      }
  };

  initPhotoSwipeFromDOM('.my-gallery');
